11   PetscErrorCode (*destroy)(PC);
12   PetscErrorCode (*setup)(PC);
13   PetscErrorCode (*apply)(PC, Vec, Vec);
14   PetscErrorCode (*matapply)(PC, Mat, Mat);
15   PetscErrorCode (*applysymmetricleft)(PC, Vec, Vec);
16   PetscErrorCode (*applysymmetricright)(PC, Vec, Vec);
17   PetscErrorCode (*applyBA)(PC, PCSide, Vec, Vec, Vec);
18   PetscErrorCode (*presolve)(PC, KSP, Vec, Vec);
19   PetscErrorCode (*postsolve)(PC, KSP, Vec, Vec);
20   PetscErrorCode (*view)(PC, PetscViewer);
21   PetscErrorCode (*applytranspose)(PC, Vec, Vec);
22   PetscErrorCode (*matapplytranspose)(PC, Mat, Mat);
23 …PetscErrorCode (*applyrich)(PC, Vec, Vec, Vec, PetscReal, PetscReal, PetscReal, PetscInt, PetscBoo…
29 …PCShellGetContext - Returns the user-provided context associated with a shell `PC` that was provid…
34 . pc - of type `PCSHELL`
50 .seealso: [](ch_ksp), `PC`, `PCSHELL`, `PCShellSetContext()`, `PCShellSetApply()`, `PCShellSetDestr…
52 PetscErrorCode PCShellGetContext(PC pc, PetscCtxRt ctx)  in PCShellGetContext()  argument
57   PetscValidHeaderSpecific(pc, PC_CLASSID, 1);  in PCShellGetContext()
59   PetscCall(PetscObjectTypeCompare((PetscObject)pc, PCSHELL, &flg));  in PCShellGetContext()
61   else *(void **)ctx = ((PC_Shell *)pc->data)->ctx;  in PCShellGetContext()
66 …PCShellSetContext - sets the context for a shell `PC` that can be accessed with `PCShellGetContext…
71 + pc  - the `PC` of type `PCSHELL`
79 …One should also provide a routine to destroy the context when `pc` is destroyed with `PCShellSetDe…
85 .seealso: [](ch_ksp), `PC`, `PCShellGetContext()`, `PCSHELL`, `PCShellSetApply()`, `PCShellSetDestr…
87 PetscErrorCode PCShellSetContext(PC pc, PetscCtx ctx)  in PCShellSetContext()  argument
89   PC_Shell *shell = (PC_Shell *)pc->data;  in PCShellSetContext()
93   PetscValidHeaderSpecific(pc, PC_CLASSID, 1);  in PCShellSetContext()
94   PetscCall(PetscObjectTypeCompare((PetscObject)pc, PCSHELL, &flg));  in PCShellSetContext()
99 static PetscErrorCode PCSetUp_Shell(PC pc)  in PCSetUp_Shell()  argument
101   PC_Shell *shell = (PC_Shell *)pc->data;  in PCSetUp_Shell()
104 …ck(shell->setup, PetscObjectComm((PetscObject)pc), PETSC_ERR_USER, "No setup() routine provided to…  in PCSetUp_Shell()
105   PetscCallBack("PCSHELL callback setup", (*shell->setup)(pc));  in PCSetUp_Shell()
109 static PetscErrorCode PCApply_Shell(PC pc, Vec x, Vec y)  in PCApply_Shell()  argument
111   PC_Shell        *shell = (PC_Shell *)pc->data;  in PCApply_Shell()
115 …ck(shell->apply, PetscObjectComm((PetscObject)pc), PETSC_ERR_USER, "No apply() routine provided to…  in PCApply_Shell()
117   PetscCallBack("PCSHELL callback apply", (*shell->apply)(pc, x, y));  in PCApply_Shell()
124 static PetscErrorCode PCMatApply_Shell(PC pc, Mat X, Mat Y)  in PCMatApply_Shell()  argument
126   PC_Shell        *shell = (PC_Shell *)pc->data;  in PCMatApply_Shell()
130 …shell->matapply, PetscObjectComm((PetscObject)pc), PETSC_ERR_USER, "No apply() routine provided to…  in PCMatApply_Shell()
132   PetscCallBack("PCSHELL callback apply", (*shell->matapply)(pc, X, Y));  in PCMatApply_Shell()
139 static PetscErrorCode PCApplySymmetricLeft_Shell(PC pc, Vec x, Vec y)  in PCApplySymmetricLeft_Shell()  argument
141   PC_Shell *shell = (PC_Shell *)pc->data;  in PCApplySymmetricLeft_Shell()
144 …lysymmetricleft, PetscObjectComm((PetscObject)pc), PETSC_ERR_USER, "No apply() routine provided to…  in PCApplySymmetricLeft_Shell()
145   PetscCallBack("PCSHELL callback apply symmetric left", (*shell->applysymmetricleft)(pc, x, y));  in PCApplySymmetricLeft_Shell()
149 static PetscErrorCode PCApplySymmetricRight_Shell(PC pc, Vec x, Vec y)  in PCApplySymmetricRight_Shell()  argument
151   PC_Shell *shell = (PC_Shell *)pc->data;  in PCApplySymmetricRight_Shell()
154 …ysymmetricright, PetscObjectComm((PetscObject)pc), PETSC_ERR_USER, "No apply() routine provided to…  in PCApplySymmetricRight_Shell()
155   PetscCallBack("PCSHELL callback apply symmetric right", (*shell->applysymmetricright)(pc, x, y));  in PCApplySymmetricRight_Shell()
159 static PetscErrorCode PCApplyBA_Shell(PC pc, PCSide side, Vec x, Vec y, Vec w)  in PCApplyBA_Shell()  argument
161   PC_Shell        *shell = (PC_Shell *)pc->data;  in PCApplyBA_Shell()
165 …shell->applyBA, PetscObjectComm((PetscObject)pc), PETSC_ERR_USER, "No applyBA() routine provided t…  in PCApplyBA_Shell()
167   PetscCallBack("PCSHELL callback applyBA", (*shell->applyBA)(pc, side, x, y, w));  in PCApplyBA_Shell()
174 static PetscErrorCode PCPreSolveChangeRHS_Shell(PC pc, PetscBool *change)  in PCPreSolveChangeRHS_Shell()  argument
181 static PetscErrorCode PCPreSolve_Shell(PC pc, KSP ksp, Vec b, Vec x)  in PCPreSolve_Shell()  argument
183   PC_Shell *shell = (PC_Shell *)pc->data;  in PCPreSolve_Shell()
186 …ell->presolve, PetscObjectComm((PetscObject)pc), PETSC_ERR_USER, "No presolve() routine provided t…  in PCPreSolve_Shell()
187   PetscCallBack("PCSHELL callback presolve", (*shell->presolve)(pc, ksp, b, x));  in PCPreSolve_Shell()
191 static PetscErrorCode PCPostSolve_Shell(PC pc, KSP ksp, Vec b, Vec x)  in PCPostSolve_Shell()  argument
193   PC_Shell *shell = (PC_Shell *)pc->data;  in PCPostSolve_Shell()
196 …ll->postsolve, PetscObjectComm((PetscObject)pc), PETSC_ERR_USER, "No postsolve() routine provided …  in PCPostSolve_Shell()
197   PetscCallBack("PCSHELL callback postsolve()", (*shell->postsolve)(pc, ksp, b, x));  in PCPostSolve_Shell()
201 static PetscErrorCode PCApplyTranspose_Shell(PC pc, Vec x, Vec y)  in PCApplyTranspose_Shell()  argument
203   PC_Shell        *shell = (PC_Shell *)pc->data;  in PCApplyTranspose_Shell()
207 …ytranspose, PetscObjectComm((PetscObject)pc), PETSC_ERR_USER, "No applytranspose() routine provide…  in PCApplyTranspose_Shell()
209   PetscCallBack("PCSHELL callback applytranspose", (*shell->applytranspose)(pc, x, y));  in PCApplyTranspose_Shell()
216 static PetscErrorCode PCMatApplyTranspose_Shell(PC pc, Mat x, Mat y)  in PCMatApplyTranspose_Shell()  argument
218   PC_Shell        *shell = (PC_Shell *)pc->data;  in PCMatApplyTranspose_Shell()
222 …transpose, PetscObjectComm((PetscObject)pc), PETSC_ERR_USER, "No matapplytranspose() routine provi…  in PCMatApplyTranspose_Shell()
224   PetscCallBack("PCSHELL callback matapplytranspose", (*shell->matapplytranspose)(pc, x, y));  in PCMatApplyTranspose_Shell()
231 static PetscErrorCode PCApplyRichardson_Shell(PC pc, Vec x, Vec y, Vec w, PetscReal rtol, PetscReal…  in PCApplyRichardson_Shell()  argument
233   PC_Shell        *shell = (PC_Shell *)pc->data;  in PCApplyRichardson_Shell()
237 …>applyrich, PetscObjectComm((PetscObject)pc), PETSC_ERR_USER, "No applyrichardson() routine provid…  in PCApplyRichardson_Shell()
239 …PetscCallBack("PCSHELL callback applyrichardson", (*shell->applyrich)(pc, x, y, w, rtol, abstol, d…  in PCApplyRichardson_Shell()
246 static PetscErrorCode PCDestroy_Shell(PC pc)  in PCDestroy_Shell()  argument
248   PC_Shell *shell = (PC_Shell *)pc->data;  in PCDestroy_Shell()
252   if (shell->destroy) PetscCallBack("PCSHELL callback destroy", (*shell->destroy)(pc));  in PCDestroy_Shell()
253   PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetDestroy_C", NULL));  in PCDestroy_Shell()
254   PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetSetUp_C", NULL));  in PCDestroy_Shell()
255   PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetApply_C", NULL));  in PCDestroy_Shell()
256   PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetMatApply_C", NULL));  in PCDestroy_Shell()
257   PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetApplySymmetricLeft_C", NULL));  in PCDestroy_Shell()
258   PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetApplySymmetricRight_C", NULL));  in PCDestroy_Shell()
259   PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetApplyBA_C", NULL));  in PCDestroy_Shell()
260   PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetPreSolve_C", NULL));  in PCDestroy_Shell()
261   PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetPostSolve_C", NULL));  in PCDestroy_Shell()
262   PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetView_C", NULL));  in PCDestroy_Shell()
263   PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetApplyTranspose_C", NULL));  in PCDestroy_Shell()
264   PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetMatApplyTranspose_C", NULL));  in PCDestroy_Shell()
265   PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetName_C", NULL));  in PCDestroy_Shell()
266   PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellGetName_C", NULL));  in PCDestroy_Shell()
267   PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetApplyRichardson_C", NULL));  in PCDestroy_Shell()
268   PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCPreSolveChangeRHS_C", NULL));  in PCDestroy_Shell()
269   PetscCall(PetscFree(pc->data));  in PCDestroy_Shell()
273 static PetscErrorCode PCView_Shell(PC pc, PetscViewer viewer)  in PCView_Shell()  argument
275   PC_Shell *shell = (PC_Shell *)pc->data;  in PCView_Shell()
286     PetscCall((*shell->view)(pc, viewer));  in PCView_Shell()
292 static PetscErrorCode PCShellSetDestroy_Shell(PC pc, PetscErrorCode (*destroy)(PC))  in PCShellSetDestroy_Shell()  argument
294   PC_Shell *shell = (PC_Shell *)pc->data;  in PCShellSetDestroy_Shell()
301 static PetscErrorCode PCShellSetSetUp_Shell(PC pc, PetscErrorCode (*setup)(PC))  in PCShellSetSetUp_Shell()  argument
303   PC_Shell *shell = (PC_Shell *)pc->data;  in PCShellSetSetUp_Shell()
307   if (setup) pc->ops->setup = PCSetUp_Shell;  in PCShellSetSetUp_Shell()
308   else pc->ops->setup = NULL;  in PCShellSetSetUp_Shell()
312 static PetscErrorCode PCShellSetApply_Shell(PC pc, PetscErrorCode (*apply)(PC, Vec, Vec))  in PCShellSetApply_Shell()  argument
314   PC_Shell *shell = (PC_Shell *)pc->data;  in PCShellSetApply_Shell()
321 static PetscErrorCode PCShellSetMatApply_Shell(PC pc, PetscErrorCode (*matapply)(PC, Mat, Mat))  in PCShellSetMatApply_Shell()  argument
323   PC_Shell *shell = (PC_Shell *)pc->data;  in PCShellSetMatApply_Shell()
327   if (matapply) pc->ops->matapply = PCMatApply_Shell;  in PCShellSetMatApply_Shell()
328   else pc->ops->matapply = NULL;  in PCShellSetMatApply_Shell()
332 static PetscErrorCode PCShellSetApplySymmetricLeft_Shell(PC pc, PetscErrorCode (*apply)(PC, Vec, Ve…  in PCShellSetApplySymmetricLeft_Shell()  argument
334   PC_Shell *shell = (PC_Shell *)pc->data;  in PCShellSetApplySymmetricLeft_Shell()
341 static PetscErrorCode PCShellSetApplySymmetricRight_Shell(PC pc, PetscErrorCode (*apply)(PC, Vec, V…  in PCShellSetApplySymmetricRight_Shell()  argument
343   PC_Shell *shell = (PC_Shell *)pc->data;  in PCShellSetApplySymmetricRight_Shell()
350 static PetscErrorCode PCShellSetApplyBA_Shell(PC pc, PetscErrorCode (*applyBA)(PC, PCSide, Vec, Vec…  in PCShellSetApplyBA_Shell()  argument
352   PC_Shell *shell = (PC_Shell *)pc->data;  in PCShellSetApplyBA_Shell()
356   if (applyBA) pc->ops->applyBA = PCApplyBA_Shell;  in PCShellSetApplyBA_Shell()
357   else pc->ops->applyBA = NULL;  in PCShellSetApplyBA_Shell()
361 static PetscErrorCode PCShellSetPreSolve_Shell(PC pc, PCShellPSolveFn *presolve)  in PCShellSetPreSolve_Shell()  argument
363   PC_Shell *shell = (PC_Shell *)pc->data;  in PCShellSetPreSolve_Shell()
368     pc->ops->presolve = PCPreSolve_Shell;  in PCShellSetPreSolve_Shell()
369 …PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCPreSolveChangeRHS_C", PCPreSolveChangeRHS…  in PCShellSetPreSolve_Shell()
371     pc->ops->presolve = NULL;  in PCShellSetPreSolve_Shell()
372     PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCPreSolveChangeRHS_C", NULL));  in PCShellSetPreSolve_Shell()
377 static PetscErrorCode PCShellSetPostSolve_Shell(PC pc, PCShellPSolveFn *postsolve)  in PCShellSetPostSolve_Shell()  argument
379   PC_Shell *shell = (PC_Shell *)pc->data;  in PCShellSetPostSolve_Shell()
383   if (postsolve) pc->ops->postsolve = PCPostSolve_Shell;  in PCShellSetPostSolve_Shell()
384   else pc->ops->postsolve = NULL;  in PCShellSetPostSolve_Shell()
388 static PetscErrorCode PCShellSetView_Shell(PC pc, PetscErrorCode (*view)(PC, PetscViewer))  in PCShellSetView_Shell()  argument
390   PC_Shell *shell = (PC_Shell *)pc->data;  in PCShellSetView_Shell()
397 static PetscErrorCode PCShellSetApplyTranspose_Shell(PC pc, PetscErrorCode (*applytranspose)(PC, Ve…  in PCShellSetApplyTranspose_Shell()  argument
399   PC_Shell *shell = (PC_Shell *)pc->data;  in PCShellSetApplyTranspose_Shell()
403   if (applytranspose) pc->ops->applytranspose = PCApplyTranspose_Shell;  in PCShellSetApplyTranspose_Shell()
404   else pc->ops->applytranspose = NULL;  in PCShellSetApplyTranspose_Shell()
408 …atic PetscErrorCode PCShellSetMatApplyTranspose_Shell(PC pc, PetscErrorCode (*matapplytranspose)(P…  in PCShellSetMatApplyTranspose_Shell()  argument
410   PC_Shell *shell = (PC_Shell *)pc->data;  in PCShellSetMatApplyTranspose_Shell()
414   if (matapplytranspose) pc->ops->matapplytranspose = PCMatApplyTranspose_Shell;  in PCShellSetMatApplyTranspose_Shell()
415   else pc->ops->matapplytranspose = NULL;  in PCShellSetMatApplyTranspose_Shell()
419 static PetscErrorCode PCShellSetApplyRichardson_Shell(PC pc, PetscErrorCode (*applyrich)(PC, Vec, V…  in PCShellSetApplyRichardson_Shell()  argument
421   PC_Shell *shell = (PC_Shell *)pc->data;  in PCShellSetApplyRichardson_Shell()
425   if (applyrich) pc->ops->applyrichardson = PCApplyRichardson_Shell;  in PCShellSetApplyRichardson_Shell()
426   else pc->ops->applyrichardson = NULL;  in PCShellSetApplyRichardson_Shell()
430 static PetscErrorCode PCShellSetName_Shell(PC pc, const char name[])  in PCShellSetName_Shell()  argument
432   PC_Shell *shell = (PC_Shell *)pc->data;  in PCShellSetName_Shell()
440 static PetscErrorCode PCShellGetName_Shell(PC pc, const char *name[])  in PCShellGetName_Shell()  argument
442   PC_Shell *shell = (PC_Shell *)pc->data;  in PCShellGetName_Shell()
455 + pc      - the preconditioner context
459 . pc - the preconditioner
465 PetscErrorCode PCShellSetDestroy(PC pc, PetscErrorCode (*destroy)(PC pc))  in PCShellSetDestroy()  argument
468   PetscValidHeaderSpecific(pc, PC_CLASSID, 1);  in PCShellSetDestroy()
469   PetscTryMethod(pc, "PCShellSetDestroy_C", (PC, PetscErrorCode (*)(PC)), (pc, destroy));  in PCShellSetDestroy()
480 + pc    - the preconditioner context
484 . pc - the preconditioner
493 PetscErrorCode PCShellSetSetUp(PC pc, PetscErrorCode (*setup)(PC pc))  in PCShellSetSetUp()  argument
496   PetscValidHeaderSpecific(pc, PC_CLASSID, 1);  in PCShellSetSetUp()
497   PetscTryMethod(pc, "PCShellSetSetUp_C", (PC, PetscErrorCode (*)(PC)), (pc, setup));  in PCShellSetSetUp()
507 + pc   - the preconditioner context
511 + pc - the preconditioner
519 .seealso: [](ch_ksp), `PC`, `PCSHELL`, `PCShellSetApplyRichardson()`, `PCShellSetSetUp()`, `PCShell…
521 PetscErrorCode PCShellSetView(PC pc, PetscErrorCode (*view)(PC pc, PetscViewer v))  in PCShellSetView()  argument
524   PetscValidHeaderSpecific(pc, PC_CLASSID, 1);  in PCShellSetView()
525   PetscTryMethod(pc, "PCShellSetView_C", (PC, PetscErrorCode (*)(PC, PetscViewer)), (pc, view));  in PCShellSetView()
535 + pc    - the preconditioner context
539 + pc   - the preconditioner, get the application context with `PCShellGetContext()`
550 PetscErrorCode PCShellSetApply(PC pc, PetscErrorCode (*apply)(PC pc, Vec xin, Vec xout))  in PCShellSetApply()  argument
553   PetscValidHeaderSpecific(pc, PC_CLASSID, 1);  in PCShellSetApply()
554   PetscTryMethod(pc, "PCShellSetApply_C", (PC, PetscErrorCode (*)(PC, Vec, Vec)), (pc, apply));  in PCShellSetApply()
564 + pc       - the preconditioner context
568 + pc   - the preconditioner
579 PetscErrorCode PCShellSetMatApply(PC pc, PetscErrorCode (*matapply)(PC pc, Mat Xin, Mat Xout))  in PCShellSetMatApply()  argument
582   PetscValidHeaderSpecific(pc, PC_CLASSID, 1);  in PCShellSetMatApply()
583 …PetscTryMethod(pc, "PCShellSetMatApply_C", (PC, PetscErrorCode (*)(PC, Mat, Mat)), (pc, matapply));  in PCShellSetMatApply()
593 + pc    - the preconditioner context
597 + pc   - the preconditioner
608 PetscErrorCode PCShellSetApplySymmetricLeft(PC pc, PetscErrorCode (*apply)(PC pc, Vec xin, Vec xout…  in PCShellSetApplySymmetricLeft()  argument
611   PetscValidHeaderSpecific(pc, PC_CLASSID, 1);  in PCShellSetApplySymmetricLeft()
612 …PetscTryMethod(pc, "PCShellSetApplySymmetricLeft_C", (PC, PetscErrorCode (*)(PC, Vec, Vec)), (pc, …  in PCShellSetApplySymmetricLeft()
622 + pc    - the preconditioner context
626 + pc   - the preconditioner
637 PetscErrorCode PCShellSetApplySymmetricRight(PC pc, PetscErrorCode (*apply)(PC pc, Vec xin, Vec xou…  in PCShellSetApplySymmetricRight()  argument
640   PetscValidHeaderSpecific(pc, PC_CLASSID, 1);  in PCShellSetApplySymmetricRight()
641 …PetscTryMethod(pc, "PCShellSetApplySymmetricRight_C", (PC, PetscErrorCode (*)(PC, Vec, Vec)), (pc,…  in PCShellSetApplySymmetricRight()
651 + pc      - the preconditioner context
655 + pc   - the preconditioner
668 PetscErrorCode PCShellSetApplyBA(PC pc, PetscErrorCode (*applyBA)(PC pc, PCSide side, Vec xin, Vec …  in PCShellSetApplyBA()  argument
671   PetscValidHeaderSpecific(pc, PC_CLASSID, 1);  in PCShellSetApplyBA()
672 …PetscTryMethod(pc, "PCShellSetApplyBA_C", (PC, PetscErrorCode (*)(PC, PCSide, Vec, Vec, Vec)), (pc…  in PCShellSetApplyBA()
682 + pc             - the preconditioner context
686 + pc   - the preconditioner
697 PetscErrorCode PCShellSetApplyTranspose(PC pc, PetscErrorCode (*applytranspose)(PC pc, Vec xin, Vec…  in PCShellSetApplyTranspose()  argument
700   PetscValidHeaderSpecific(pc, PC_CLASSID, 1);  in PCShellSetApplyTranspose()
701 …PetscTryMethod(pc, "PCShellSetApplyTranspose_C", (PC, PetscErrorCode (*)(PC, Vec, Vec)), (pc, appl…  in PCShellSetApplyTranspose()
711 + pc                - the preconditioner context
715 + pc   - the preconditioner
726 PetscErrorCode PCShellSetMatApplyTranspose(PC pc, PetscErrorCode (*matapplytranspose)(PC pc, Mat xi…  in PCShellSetMatApplyTranspose()  argument
729   PetscValidHeaderSpecific(pc, PC_CLASSID, 1);  in PCShellSetMatApplyTranspose()
730 …PetscTryMethod(pc, "PCShellSetMatApplyTranspose_C", (PC, PetscErrorCode (*)(PC, Mat, Mat)), (pc, m…  in PCShellSetMatApplyTranspose()
742 + pc       - the preconditioner context
752 PetscErrorCode PCShellSetPreSolve(PC pc, PCShellPSolveFn *presolve)  in PCShellSetPreSolve()  argument
755   PetscValidHeaderSpecific(pc, PC_CLASSID, 1);  in PCShellSetPreSolve()
756   PetscTryMethod(pc, "PCShellSetPreSolve_C", (PC, PCShellPSolveFn *), (pc, presolve));  in PCShellSetPreSolve()
768 + pc        - the preconditioner context
778 PetscErrorCode PCShellSetPostSolve(PC pc, PCShellPSolveFn *postsolve)  in PCShellSetPostSolve()  argument
781   PetscValidHeaderSpecific(pc, PC_CLASSID, 1);  in PCShellSetPostSolve()
782   PetscTryMethod(pc, "PCShellSetPostSolve_C", (PC, PCShellPSolveFn *), (pc, postsolve));  in PCShellSetPostSolve()
793 + pc   - the preconditioner context
803 PetscErrorCode PCShellSetName(PC pc, const char name[])  in PCShellSetName()  argument
806   PetscValidHeaderSpecific(pc, PC_CLASSID, 1);  in PCShellSetName()
807   PetscTryMethod(pc, "PCShellSetName_C", (PC, const char[]), (pc, name));  in PCShellSetName()
818 . pc - the preconditioner context
827 PetscErrorCode PCShellGetName(PC pc, const char *name[])  in PCShellGetName()  argument
830   PetscValidHeaderSpecific(pc, PC_CLASSID, 1);  in PCShellGetName()
832   PetscUseMethod(pc, "PCShellGetName_C", (PC, const char *[]), (pc, name));  in PCShellGetName()
843 + pc    - the preconditioner context
847 + pc               - the preconditioner
869 PetscErrorCode PCShellSetApplyRichardson(PC pc, PetscErrorCode (*apply)(PC pc, Vec b, Vec x, Vec r,…  in PCShellSetApplyRichardson()  argument
872   PetscValidHeaderSpecific(pc, PC_CLASSID, 1);  in PCShellSetApplyRichardson()
873 …pc, "PCShellSetApplyRichardson_C", (PC, PetscErrorCode (*)(PC, Vec, Vec, Vec, PetscReal, PetscReal…  in PCShellSetApplyRichardson()
885   extern PetscErrorCode apply(PC,Vec,Vec);
886   extern PetscErrorCode applyba(PC,PCSide,Vec,Vec,Vec);
887   extern PetscErrorCode applytranspose(PC,Vec,Vec);
888   extern PetscErrorCode setup(PC);
889   extern PetscErrorCode destroy(PC);
891   PCCreate(comm,&pc);
892   PCSetType(pc,PCSHELL);
893   PCShellSetContext(pc,ctx)
894   PCShellSetApply(pc,apply);
895   PCShellSetApplyBA(pc,applyba);               (optional)
896   PCShellSetApplyTranspose(pc,applytranspose); (optional)
897   PCShellSetSetUp(pc,setup);                   (optional)
898   PCShellSetDestroy(pc,destroy);               (optional)
909 .seealso: [](ch_ksp), `PCCreate()`, `PCSetType()`, `PCType`, `PC`,
915 PETSC_EXTERN PetscErrorCode PCCreate_Shell(PC pc)  in PCCreate_Shell()  argument
921   pc->data = (void *)shell;  in PCCreate_Shell()
923   pc->ops->destroy             = PCDestroy_Shell;  in PCCreate_Shell()
924   pc->ops->view                = PCView_Shell;  in PCCreate_Shell()
925   pc->ops->apply               = PCApply_Shell;  in PCCreate_Shell()
926   pc->ops->applysymmetricleft  = PCApplySymmetricLeft_Shell;  in PCCreate_Shell()
927   pc->ops->applysymmetricright = PCApplySymmetricRight_Shell;  in PCCreate_Shell()
928   pc->ops->matapply            = NULL;  in PCCreate_Shell()
929   pc->ops->applytranspose      = NULL;  in PCCreate_Shell()
930   pc->ops->applyrichardson     = NULL;  in PCCreate_Shell()
931   pc->ops->setup               = NULL;  in PCCreate_Shell()
932   pc->ops->presolve            = NULL;  in PCCreate_Shell()
933   pc->ops->postsolve           = NULL;  in PCCreate_Shell()
948 …PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetDestroy_C", PCShellSetDestroy_She…  in PCCreate_Shell()
949 …PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetSetUp_C", PCShellSetSetUp_Shell));  in PCCreate_Shell()
950 …PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetApply_C", PCShellSetApply_Shell));  in PCCreate_Shell()
951 …PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetMatApply_C", PCShellSetMatApply_S…  in PCCreate_Shell()
952 …PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetApplySymmetricLeft_C", PCShellSet…  in PCCreate_Shell()
953 …PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetApplySymmetricRight_C", PCShellSe…  in PCCreate_Shell()
954 …PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetApplyBA_C", PCShellSetApplyBA_She…  in PCCreate_Shell()
955 …PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetPreSolve_C", PCShellSetPreSolve_S…  in PCCreate_Shell()
956 …PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetPostSolve_C", PCShellSetPostSolve…  in PCCreate_Shell()
957   PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetView_C", PCShellSetView_Shell));  in PCCreate_Shell()
958 …PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetApplyTranspose_C", PCShellSetAppl…  in PCCreate_Shell()
959 …PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetMatApplyTranspose_C", PCShellSetM…  in PCCreate_Shell()
960   PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetName_C", PCShellSetName_Shell));  in PCCreate_Shell()
961   PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellGetName_C", PCShellGetName_Shell));  in PCCreate_Shell()
962 …PetscCall(PetscObjectComposeFunction((PetscObject)pc, "PCShellSetApplyRichardson_C", PCShellSetApp…  in PCCreate_Shell()